1965 featured all new styling, and a longer 133" wheelbase. The Fleetwood Sixty Special was now back to being a pillared sedan (the B-pillar was absent from 1957), and also new for '65 was the available "Brougham" package, which added $194 to Sixty Special's base price of $6,479. Included in the package was a padded grained-vinyl roof covering with "Brougham" nomenclature on the C-pillar. 18,100 Sixty-Specials were built for 1965.
1966, with minor trim changes, now offered Cadillac buyers two models in this series to choose from - the standard Fleetwood Sixty Special (priced at $6,378) and the new Fleetwood Sixty Special Brougham ($6,695). The Brougham option package proved so popular the previous year that it was named as a separate model for '66. The Brougham model included a formal-looking vinyl roof covering, and luxurious appointments inside such as genuine walnut trim and, for rear seat passengers, lighted picnic tables, foot rests, and reading lamps. This was the last year that the Sixty-Special would serve as a body-sharing companion to the Eldorado convertible, as the '67 Eldorado moved to front-wheel drive and all new sheet metal. The new Fleetwood Brougham sold over 13,630 copies, surpassing the standard Sixty-Special which sold only 5,445 units.
1967 Cadillacs had all-new styling (but the Sixty-Special continued with an exclusive 133 in (3,400 mm) wheelbase), and the $6,739 Fleetwood Brougham continued to outsell the $6,423 Sixty-Special - 12,750 units versus 3,550 standard Sixty-Specials.
1968 featured mostly carry-over styling from 1967, but the hood was longer this year, as it extended all the way to the base of the windshield to cover the "hidden" windshield wipers. Also new for '68 was a stylish beveled deck lid. The $6,867 vinyl-roofed Fleetwood Brougham sold 15,300 models this year, while the standard Sixty-Special with its painted metal roof (priced at $6,552) sold just 3,300 cars. Most Cadillac buyers clearly considered the $315 price difference worthwhile.
1969 models ushered in all-new styling, and the two Sixty-Special models had distinct rooflines from the other Cadillacs. A 60/40 split bench seat was standard in the Fleetwood Brougham, optional in Sixty-Special. Safety was a new priority at Cadillac, which introduced a new steering column that not only was designed to absorb impact and collapse in a collision, but also had theft-deterrent features such as an ignition key switch activated steering wheel and transmission shifter lock mechanism. Head rests were standard on front seats, while seat belts were provided for all six passengers. The 375 hp (280 kW) 472 cu in (7.73 L) engine carried over from 1968. Also of note this year was the disappearance of the small vent windows on the front and rear doors. Fleetwood Brougham, at $7,092, included a vinyl roof top (available in six colors), as well as rear-seat foot rests and an automatic level control for the rear wheels which kept the car level despite the weight of fuel, passengers, or cargo. Fleetwood Brougham's sales of 17,300 units easily surpassed the 2,545 copies of the standard $6,761 Sixty-Special.
The 1970 Sixty-Special received few changes, aside from the usual new grille and tail lamps. Sixty-Special had long been recognized for its bold, bare side body, but this year the models received a 'chrome with vinyl insert' body-side molding. It was really the first prominent side molding on Sixty-Special since the 'rocket-ship' 1958 model. It did not take much away from Sixty-Special's individuality, and certainly improved the chances of a devastating parking-lot door 'ding' on those smooth, slab sides. Sales and production figures include 16,913 units of the Fleetwood Brougham at $7,284; and just 1,738 units of the Sixty-Special at $6,953. This would be the last year for the standard, metal-roofed Sixty-Special.